THz-infra-UV transmission spectra of BGO:Ca/Pb crystals

Bihui Hou; Na Li; Wei Hao; Ya-li Wang; Bingxin Yang; Renbin Zhong

doi:10.1117/12.869867

4 November 2010 THz-infra-UV transmission spectra of BGO:Ca/Pb crystals

Bihui Hou, Na Li, Wei Hao, Ya-li Wang, Bingxin Yang, Renbin Zhong

Proceedings Volume 7854, Infrared, Millimeter Wave, and Terahertz Technologies; 785405 (2010) https://doi.org/10.1117/12.869867
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

The THz-Infra-UV transmission spectra of Bi4Ge3O12 (BGO) and BGO:Ca, BGO:Pb crystals have been measured at the room temperature. The forbidden gap Eg of electronic energy bands are about 3.66eV (339nm). The quantities of adulteration Ca²⁺ and Pb²⁺ were very little (0.02 wt %), it did not influence Eg and the breadth of phonon absorption. The high frequency edge of the phonon absorption of the crystals was at 1700cm-1 (or 51THz). The low frequency edge of the phonon absorption was at 66 cm^-1 (or 1.98THz). Below 2.00THz the transmission T(1/λ) largened, maybe a nice transmission would be below 2.00THz in the three samples. The influence to the transmission from impurity Ca2+ ion was smaller than 10%, and from impurity Pb2+ion was smaller than 5%. Below 2.00THz the transmission T(1/λ) largened in the three samples.

Citation Download Citation

Bihui Hou, Na Li, Wei Hao, Ya-li Wang, Bingxin Yang, and Renbin Zhong "THz-infra-UV transmission spectra of BGO:Ca/Pb crystals", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 785405 (4 November 2010); https://doi.org/10.1117/12.869867

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